Interchangeable metering valve control



June 3, 1941. R. w. JOHNSON INTERCHANGEABLE METERING VALVE CONTROL FiledJune 23, 1938 2 Sheets-Sheet 1 FIG.

m wm m om u mk B 14.36 222|. ik a u R. w. JOHNSON 2,244,161

INTERCHANGEABLE METERING VALVE CONTROL 2 Sheets-Sheet f,

June 3, 1941.

Filed June 25, 1958 'o FIG.

IO/ INVENTOR ROY W. JOHNSON BYQMMMML ATTORNEY Patented `lune 3, 194iGFFICE INTERCHANGEABLE IVMTERWG VALVE CONTROL Roy W. Johnson, Milwaukee,Wis.

Application :une ze, '1938, serian No. 215,336 v 22 Claims.

This invention relates to an improvement in control devices of the typeincorporated in the fuel line between a reservoir and a burner where theliquid fuel is fed by gravity to the burner.

Devices of this character usually consist of a casing having a liquidsupply chamber provided with a fuel inlet which is connected up to thereservoir. A float controlled valve regulates ow of the fuel in throughthe inlet to maintain a constant level in the liquid supply chamber.This chamber is provided with an outlet connected up to the burner. Ametering valve which may be either manually or thermostaticallycontrolled regulates the flow of oil or liquid fuel through the outletto the burner.

One of the lprincipal objects of the invention is to provide a controldevice of this character with an improved type of metering valve actionand control whereby to insure uniform predetermined variations in oilflow over the entire operating range of the valve and hence bring abouta smooth metering action and avoid sudden increase in oil flow. High andlow iire adjustments are facilitated and the safety and reliability ofthe device are enhanced. The high re adjustmentis such as to eliminateoverrating of the burner` while the low nre adjustment reducescarbonization to a minimum by providing a definite, clean low re. l

Another object of the invention is to facilitate the conversion of thedevice from a manually controlled to a thermostatically controlled unit.

Another object of the invention is to provide an oil control device ofthis character which is simple and durable in its construction, compact-1y and` closely organized, reliable and efficient in operation, and easyand comparatively inexpensive to manufacture.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims, reference being had to the accompanying drawingsforming a part of this specication and in which:

Figure 1 is a view partly in sida elevation and partly in longitudinalvertical cross section showing an oil control device embodying thepresent invention and equipped for manual control;

Figure 2 is a fragmentary view in transverse vertical cross sectiontaken on line 2 2` of Figure 3; l

Figure 3 is a fragmentary view in horizontal cross section taken on line3-3 of Figure 2;

Figure 4 is a similar view taken on line 4--4 of Figure 2;

Figure r5 is a fragmentary view in top plan showing the portion of thecasing with which the control knob is associated;

Figure 6 is a detail view of the tubular structure and cam priorA to itsassociation with the control knob;

Figure 7 is a fragmentary view in side elevation and partly inlongitudinal vertical cross section showing the oil control deviceequipped with a thermostatic control; and

Figure 8 is a fragmentary view in horizontal cross section taken on line8--8 of Figure 7.

Referring to the drawings and more particularly to Figure l, it will beseen that the control device comprises a casing designated generally atitl and having a main liquid supply chamber l l therein. Liquid fuel issupplied through a strainer l2 provided in an inlet passageway i2' to aninlet valve i3 controlled by a main oat iii so that a constant level ofliquid is maintained in a supply chamber il. A safety shut-offmechanismV designated generally at l5 is combined with the means iormaintaining a level or liquid in the main supply chamber il in themanner fully described and claimed in` my Patentl2,- 068,*l38 grantedJanuary 19, 1937.

The liquid hows out of the main supply chamber il through one or moreoutlet passages it which are connected up to the burner (not shown). Asthe outlet passages and their associated mechanism are identical, adescription of one will serve.

A tubular valve guide il, which may be constituted of a brass tube. hasits lower end press itted in or otherwise suitably secured to the upperportion of the outlet passage l5, the valve guide extending verticallyin the casing and terminating a short distance below the removable coverplate it of the casing. The coverplate i8 is releasably fastened bysuitable screws 2li to a marginal cover frame i9 which is in turnreleasably fastened by screws 20 to the upper margin of the casing lo. Avalve seat 2l is machined in and constituted as an integral part of thetube l'l. Above the valve seat the tube il is provided with a lateralopening 22 `to provide for communication between the interior of theguide tube and the liquid supply chamber l I.

A metering valve designated generally at 23 is fitted in the guide tubeand has a reduced lower end 23' provided with a metering slot 23a. Thereduced lower end portion 23' vis a sliding t in a correspondinglyformed portion 24 of the tube I1, the tube portion 24 having a reducedinternal diameter and functioning as a guide for the lower end of thevalve. Just above the reduced portion 23' the metering'valve is formedwith a beveled portion 25 which coacts with the valve seat to shut oitthe flow in the fully closed or shut off position of the valve.

The upper portion of the tubular guide I1 is provided with a verticalguide slot 28 in which a guide pin 26' secured to the metering valvestem and projecting laterally therefrom slides, whereby the body portionof the valve as well as the lower end is positively guided.

'I'he metering valve is biased to open position by means of anexpansible coil spring 21 surrounding a portion of its stern andinterposed between an internal shoulder 28 on the valve tube I1 and acollar or ange 29 fixed on the metering valve stem adjacent its upperend.

The cover frame I9 has an integral transverse web 30 provided with anopening 3I through which the upper end of the metering valve stemprojects. A sheet metal bracket plate 32 is seated in a recess providedtherefor in the web 30 and is releasably secured in position by twoscrews 33. The bracket plate 32 is provided with a flanged opening whichregisters with the opening of the web, the flange of the opening beingdesignated at 34. An annular spring seat 35 which may also berstampedfrom sheet metal, is interntted with and secured to the flanged openingof the bracket plate 32 and its horizontal portion is provided with ailanged opening 36 somewhat smaller than but coaxial with the angedopening of the bracket plate. These parts provide the mounting andpartial enclosure for the assembly proposed by the present invention formanually adjusting the valve in instances where a manually operablecontrol is desirable.

The manually operable control comprises a knob or handle designatedgenerally at 40 and loosely and rotatably intertted with the ilange 34.'Ihe knob 40, which may be oi' one piece. includes inner and outercylindrical portions 4I and 42 connected at their upper ends by a domedtop portion 43. A rib-like finger grip 44 extends across the domed topportion and may project beyond one side of the knob as at 45 to providea pointer which travels across a suitable dial 45' on the cover plate I8oi' the device to indicate the position of the valve. A sleeve and camassembly designated generally at 48 is interconnected with the knob 40and extends downwardly therefrom. This assembly includes a short uppersleeve 48 which is a. press fit in, or otherwise suitably secured to theinner cylindrical section 4I of the knob. The cam of the assembly whichis constituted of a sheet metal plate, is designated generally at 49 andis interposed between the short upper sleeve 48 and a longer and largerlower sleeve 50 and is welded to both of these sleeves sothat the twosleeves and the cam are all rigidly interconnected together as well asrigidly interconnected with the control knob. The lower and longersleeve 50 loosely telescopes over the guide tube I1 and is a rotatingfit in the flange 38 of the spring seat 35. To adapt them to coact withtheir associated parts the sleeves 48 and 50 are of the steppedformation shown in Figure 2.

The knob, cam and sleeve assembly are biased downwardly by means of acoil spring 52 which surrounds the lower sleeve 50. The upper end ofthis spring 52 abuts a washer 53 which in turn abuts the ange 38 of thespring seat 35. The

washer 53 is held against rotation by means of a lug 54 integraltherewith and projecting inwardly therefrom and into a longitudinal keyslot 54' formed in the sleeve 50. The lower end of the spring abuts theflanged upper end 56 of a sheet metal band 51 which is fitted over andsuitably secured to the lower end of the sleeve 50. The spring 52 in theassembly is under suitable compression to force the control knob,sleeve, and cam assembly downwardly with the proper pressure.

An arcuate extension 59 on the flange 58 oi the band 51 is provided andcooperates with an inwardly directed stop lug 60 on the casing to limitthe extent to which the control knob, cam, and sleeve assembly may berotated in either direction.

As previously indicated, the cam is made up oi a plate of sheet metal,preferably of hardened steel, which has its central portion welded tothe two sleeves and which is provided, as illustrated in detail inFigure 6, with an arcuate slot 5I to provide a curved strip-likeperipheral portion 62 which is bent and set to give the cam the desiredshape or contour and which, in addition, may be flexed with respect tothe plane of the sheet of metal making up the cam to the extentnecessary to give the under surface of the strip 62 constituting theactive face of the cam the desired rise or throw. By constituting theactive face of the cam in this way its rise may be adjusted. This is adesirable feature to compensate for variations in the width of themetering slots. Adjustment of the curved strip 62 of the cam is eiectedby means of .an adjusting screw 63 threadedly interconnected with thecontrol knob and having its lower end rounded and bearing on the upperface of the strip 62 adjacent its free end. The upper end of the screw63 projects into a recess 64 provided in the top of the control knob andsuch end portion of the screw has a cross slot to facilitate itsmanipulation by a screw driver or the like. 'Ihis screw is adjusted atthe factory, and to prevent tampering with it in the eld its upper endmay be enclosed by a sheet metal cap which is a driving nt in the recess84.

The underside or active face of the strip 62 of the cam rides on anadjustable abutment 66 provided therefor and supported on the cross web30 o! the cover frame. This adjustable abutment comprises a strip ofsheet metal designated at 81 riveted at' one end to the cross web andprovided at its opposite end with an upstanding lug 68 on which the camrides. The strip is made of resilient metal and may be flexed to causethe lug to shift vertically. For this purpose, the strip 61, at a pointadjacent its lug 58, has an extruded andv internally threaded openingwith which an adjusting screw 1IIl is engaged. The lower end of theadjusting screw bears on the floor of a recess 1I provided therefor inthe cross web. This construction provides the low nre adjustment.

For the purpose of providing a high nre ad- Justment where changes inoil ow are desired in the field due to changes in oil viscosity or draftand yet preclude overrating of the burner, the cross web 30 is providedadjacent the metering valve assembly with a downwardly extendingenlargement 15 provided with vertically extending parallel cylinder orsocket-like structures 16 and 11. the bore of cylinder 16 being smoothWhile that of cylinder 11 is internally threaded. Both of thesecylinders 16 and 11 are open at their upper ends but have centrallyapertured lower end Walls designated at 18 and 19. A plunger 88 isslidably mounted in the cylinder 16 and has a stop pin 8| fixed theretoand projecting down through a central aperture of the end wall 18 of thecylinder 16, the parts being so arranged that the lower end of thestoppin 8| lies in the path of travel of the laterally projecting guidepin 28' of the metering valve. A spring 82 encircles the stop pin 8| andis interposed between the lower end of the plunger and the lower endwall 18 of the cylinder 16, the spring biasing the plunger and stop pinto move upwardly. The adjustment or position of the plunger 88 and stoppin 8| is determined by means of a iianged stop sleeve 83 which isexternally threaded and interengaged with the internal threads of the'cylinder 11. The upper end of this sleeve 83 has an annular flange 84which overlaps the upper end of the plunger 88. Since the spring 82maintains the plunger engaged with the ange 84 the position of theplunger and of its stop pin is accurately controlled by adjusting thisstop sleeve 83. To facilitate adjustment of the stop sleeve 83 its upperface is provided with cross slots 85 to adapt it for coaction with a.screw driver or the like.

The extent to which the sleeve 83 may be moved upwardly is limited bymeans of a stop screw 86 whose external threads are interengaged withthe internal threads of the stop sleeve. The screw 86 has its lower endportion projecting through the central aperture of the lower end wall 19of the cylinder 11 and its lower end is headed so as to overlap themargins of the f central aperture of this end wall 19 and hence limitthe upward movement of the screw 86. The screw 86 and stop sleeve 83 arerelatively adjustable and for this purpose the upper end of the screw 86is provided with a cross slot to adapt it to coact with a screw driver,access to the cross slot being had at the factory through the upper endof the bore through the stop sleeve.

After the parts have been assembled at the factory and calibrated, adrop of solder, designated at 81, is placed in the upper end of the boreof the sleeve 83 and over the upper end of the stop screw 86 so as topreclude relative adjustment of the stop screw 86 and stop sleeve 83 andthereby prevent overrating of the burner, although aiording through thelimited adjustment of the stop sleeve 83 adequate-high fire adjustmentto take care of changes in oil flow that may be necessary to compensatefor changes in oil viscosity or draft encountered in the field.

As illustrated in Figure 3, the bracket plate 32 is provided withopenings 33a and 33h which overlie the cross slotted flange 84 of theadjusting sleeve 83 and the low fire adjusting screw 18 respectively.Hence, by removing the cover plate I8, access may readily be had to boththe high and low re adjustments. I

The construction as thus far described is of the manually operatedcontrol type but it is such as to lend itself readily to conversion inthe field to a thermostatically operated unit. A

'I'he thermostatically operated control means adapted for employment inlieu of the manually operable control described is illustrated inFigures 7 and 8.

The thermostatically operated control means or control unit isdesignated generally at 98 and comprises a flat, elongated casing havinga peripheral wall 9| provided adjacent its top with integral cross webs92 and 93, the enclosure at the top being completed by a removable coverplate 94. The casing of the control unit rests flatly on top of thecover frame I9, the cover plate I8 having Ibeen removed and ls sopositioned lengthwise of the cover frame that one end of the controlunit overhangs the cover frame I8 and the casing of the device. Theoverhanging portion of the control unit is provided with a transverselyextending wall 95 to close the bottom of this portion of the controlunit.

Prior to assembling the thermostatically controlled unit with the devicenot only the name plate |8 but also the manual control assembly isremoved. This may be conveniently accomplished by backing off the screws28 which hold the name plate in position and backing off the two screws33 which secure the bracket plate 32 in place. The

control `knob 48, its bracket plate 32, the cam 49,

the sleeve arrangement 46, the spring seat 35, washer 53, spring 52 andband 51 may be then readily lifted off -or removed as a unit and thethermostatic control unit put into position and secured in such positionby suitable screws.

` Within the casing of ythe unit 98 a valve operating lever 96 isprovided and has one end pivotally supported on a fulcrum pin 91suitably secured in position on the casing and its other end, designatedat 98, downwardly oset and positioned to overlap and be engageable witha portion of the upper end of the valve 23 and also the abutment lug 68of low re abutment 66. A spring 99 interposed between the cross piece 92and lever 96 biases the lever 98 to swing in such direction as to closethe metering valve 23. A control lever |88 is provided in the casing andhas one end, designated at |8|, bearing against a boss 96' on theunderside of the lever 96 and its other end is engaged by a pointedprojection |82 of a thermostatic responsive element or bulb |83, whichdepends from the overhung end of the control unit. Intermediate its endsthe control lever |88 is rockably mounted or fulcrumed on projections|84 carried at the outer end of a fulcrum lever |85 pivotally supportedon the fulcrum pin 91 and ,controlled as to their position by anadjusting screw |86 rotatably mountedin a threaded bearing |81 providedtherefor in the casing and conveniently manipulated by means of anadjusting knob |88. The lower end of the screw |86 is rounded and bearson the lever |85 just above its projections |84. A spring |89 isinterposed between the bottom wall of the control unit and the overlyingportion of the control lever |88 to cause the parts to maintain theiroperative rela-` Reeves filed September 20, 1937, Serial No. 164,792,

for Interchangeable control valves, is provided and is combined with themetering valve to positively and fully shut the same oil when desired.

v When the thermostatic control is in operation the shut-off plunger ||8is latched in inoperative position. By virtue Yof the specialorganization of the control and shut-off levers shown in Figure '7 onlya very small movement of the thermostatic element is `necessary tochange the metering valve from high to low fire. As the temperature ofthe air passing the thermostatic element I 03 changes, the thermostaticelement will cause the metering valve stem to move, permitting more orless oil to iiow to the burner so as to maintain a uniform temperatureof the space heated. Operation is entirely automatic. Once the controlknob |08 has been set to give the desired comfortable temperature nofurther adjustment is necessary. However. the ilow of the oil can be cutoi simply by manipulating the cutoi plunger H0, allowing it to dropunder the influence of the spring and punch the metering valve closed. Awide range of operating temper- `atures is available and in theconstruction and design shown the temperaturesvmaintained may be variedbetween 35 and 90 F. The lever not only overlaps the valve but alsooverlaps the lug 68 so that the low iire adjustment is maintained asbefore. Within the casing I the same high fire adjustment is provided asin the device which is manually controlled.

While I have shown and described typical constructions in which theinvention may be embodied it is to be understood that theseconstructions have been selected merely for the purpose of illustrationor example and that various changes in the size, shape and arrangementof the parts may be made without departing from the spirit of theinvention or the scope of the subjoined claims.

The invention claimed is:

l. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet passage. atubular valve guide having its lower end connected with the outletpassage, said valve guide having an internal valve seat adjacent itslower end and being provided with a lateral opening above said valveseat to provide for communication between the liquid supply chamber and.the interior of the guide, a metering valve cooperable withthe valveseat and having its lower end guided by the lower end of said tubularvalve guide, cooperating `guide means between the upper portion of thetubular valve guide and the valve for constraining the valve to movementlongitudinally toward and away from its seat, and means for moving thevalve longitudinally.

2. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet passage, atubular valve guide having its lower end con nected to the outletpassage, said valve guide having an internal valve seat adjacent itslower end and being provided with a lateral opening above said valveseat to provide for communication between the liquid supply chamber andAthe interior of the guide, a metering valve cooperable with the valveseat and having its lower end portion in guiding engagement with aportion of the tubular valve guide below said seat, said valve guidehaving a longitudinally extending guide slot in its upper portion, aguide pin secured to the valve, projecting laterally therefrom, andslidably interiitted with said valve slide, and means for moving thevalve longitudinally.

3. A control device of the character described comprising a casinghaving a liquid supply chainber provided with an outlet, a tube havingone end connected to the outlet and provided with an internal valveseat, a metering valve slidable in the tube and cooperable with thevalve seat, means on one side of the valve seat` for constraining thevalve to longitudinal movement in the tube, said tube having alongitudinal slot on the opposite side of said valve seat, a pin iixedto the valve and slidably iitted in said slot to constrain the valve tomovement axially ot the tube, said tube having an opening affordingcommunication between the liquid supply chamber and its interior, andmeans for adjusting the valve longitudinally.

4. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a tube havingone end connected tothe outlet and provided with an internal valve seat,a metering valve slidable in the tube and cooperable 'with the valveseat, said tube having an opening aiording communication between theliquid supply chamber and its interior, cooperating means between thetube and valvel for constraining the valve to longitudinal movement, andmeans for adjusting the valve longitudinally.

5. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a cover for thecasing. having an opertured portion overlying the outlet, an outletvalve cooperable with the outlet, a spring for biasing the valve to openposition, manually operable means for closing the valve 'andcomprising aknob, a bracket secured to the cover of the casing and having an openingregistering with the opening thereof, a sleeve structure secured to theknob and extending down through the opening in the bracket and cover andshiftable vertically with respect to the cover and bracket, spring meansbetween the sleeve structure and the cover for biasing the samedownwardly, fa cam secured to the sleeve structure and having an activecam portion surrounding the same, and an abutment supported on the coverand with which said cam portion coacts whereby upon turning of the knobthe cam will be shifted vertically with respect to the cover, and meansmovable with the cam and engageable with the upper end of the outletvalve so that adjustment of the cam regulates the position oi.' thevalve.

6. An oil control device of the character descri-bed comprising a casinghaving a liquid supply chamber provided with an outlet, an outlet valveregulating ow through the outlet and biased to open position, a knobrotatably supported on the casing and having a sleeve structuredepending therefrom and surrounding the upper end of the valve, a springcooperable with the sleeve structure to bias it and the knob downwardly,a spring steel cam secured to the sleeve structure and having aresilient portion surrounding the same, means carried by the knob fordetermining the position of said resilient portion, means on the casingon which said resilient portion rides, and means connected with the camand engaged with the valve whereby turning of the knob and consequentadjustment of the cam regulates the position of the outlet valve.

'7. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet passageway, atubular valve guide having its lower end iltted in and secured to thewall of the passageway, said valve guide having an internal valve lseatadjacent its lower end and being provided with a lateral openingaiording communication between its interior and the liquid supplychamber, an outlet valve having its lower end cooperable with the valveseat. said casing having a top provided with an opening overlying theoutlet valve, a bracket secured to the top and having an openingregistering with the opening thereof. a knob rotatably interfltted withthe bracket and`having a depending sleeve structure telescoped over theupper end of the valve guide, spring means between the top and thesleeve structure for biasing the same downwardly, a cam disk xed to thesleeve structure and having a circumferentially extending slot adjacentits periphery to provide an adjustable and active cam portion, means onthe knob for controlling the position of said active cam portion, and anabutment secured to the casing and on which the active cam portionrides, the central portion of the cam engaging the upper end of theoutlet valve whereby turning of the knob regulates the position of thevalve.

8. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet passageway, atubular valve guide having its lower end fitted in and secured to thewall of the passageway, said valve guide having an internal valve seatadjacent its lower end and being provided with a lateral openingaffording communication be- 'tween its interior and the liquid supplychamber, an outlet valve having its lower end cooperable with the valveseat, said casing having a top provided with an opening overlying theoutlet valve, a bracket secured to the top and having an openingregistering with the opening thereof, a knob rotatably interfitted withthe bracket and having a depending sleeve structure telescoped over theupper end of the valve guide, spring means between the top and thesleeve structure for biasing the same downwardly, a cam disk fixed tothe sleeve structure, and an abutment secured to the casing and on whichthe cam rides, and means movable with the cam and engageable with saidvalve to control its position. i

9. A control device of the character described comprising a casinghaving a, liquid supply chamber provided with an outlet, a tubular guidehaving one end connected with the outlet and provided with an internalvalve seat, a metering valve cooperable with the valve seat, means forconstraining the metering valve to longitudinal movement, a rotarycontrol knob, a sleeve structure fixed to the knob and looselytelescoped over said tube, means for supporting the knob and sleevestructure for rotation, a cam xed to the sleeve structure and engageablewith the valve for moving the same in one direction, and means forbiasing the valve to move in an opposite direction.

10. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided With an outlet, a tubular guideconnected to the outlet and provided with an internal valve seat, ametering valve cooperable with the valve seat, means for biasing thevalve to open position, means for constraining the valve to longitudinalmovement, a rotary control knob, a sleeve structure xed to the knob andloosely telescoped over the tubular guide, a cam xed to the sleevestructure, an abutment supported in fixed position and on which the camrides, means movable with the cam and engageable with the valve tocontrol its position, and yieldable means for maintaining said lastmentioned means in engagement with the valve.

11. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor Cil regulating flow through the outlet, means for biasing themetering valve to open position, a manual control for controlling theposition of the valve and comprising a disk having a curved slotadjacent its periphery and extending out through a portion thereof toprovide a flexible cam strip, means for adjusting the cam strip to varythe rise of the cam, means for supporting and rotating the cam and meansconnecting the cam to the valve whereby to vary the position of thevalve.

12. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating iiow through the outlet, means for biasing the valve toopen position, a rotary control knob supported on the casing forrotation and for axial shifting movement, a cam disk connected to thecontrol knob and movable therewith and provided with a exible portion, axed abutment on which said flexible portion rides, means carried by theknob for flexing said portion to vary the rise of the cam, and meansmovable with the cam and cooperable with the valve to control itsposition. l

i3. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a tubular valveguide having its lower end connected to the outlet and provided with aninternal valve seat, a metering valve cooperable with said seat toregulate iiow through the outlet, a rotary control knob, a sleevestructure xed to the knob and telescoped loosely over said tubularguide, a bracket plate iixecl to the casing and having an openingthrough which said sleeve structure extends, a cam disk fixed to thesleeve structure, an abutment lxed to the casing and on which said camdisk rides, and a spring interposed between the lower end of the sleevestructure and the bracket plate for urging the cam disk into engagementwith its abutment and having means constrained to move with the cam diskand sleeve structure and cooperable with the valve whereby upon rotationof the knob the valve is adjusted longitudinally.

14. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating ow through the outlet, means for constraining themetering valve to longitudinal movement, means for adjusting the valvelongitudinally, and means for limiting the opening movement of the valveand comprising a projection on the valve, a stop cooperable with theprojection, and means for adjusting the stop comprising a pair ofadjustably interiitted parts, means for securing the parts in adjustedposition and means on the casing cooperable with one of the parts forlimiting its movement in one direction.

l5. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating flow through the outlet, means for constraining themetering valve to longitudinal movement, means `for moving the valvelongitudinally, and means for limiting the opening movement of the valvecomprising a projection extending laterally from the Valve, a stop pincooperable with the projection, a guide in which said stop pin isslidably fitted, a spring for urging the stop pin in one direction, asleeve threadedly interconnected with the casing and having a iiangecooperable with the stop pin for shifting the same against the action ofits spring, a stop screw interthreaded with the sleeve and cooperablewith the casing for limiting the movement of the sleeve in onedirection, and means for securing the stop screw and sleeve in adjustedposition.

16. An oil control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating iiow through said outlet, means for constraining themetering valve to longitudinal movement, means for biasing the meteringvalve to open position, a rotary cam cooperable with the valve forcontrolling the position thereof, and an abutment on which said camrides, said abutment including a exible strip having one end shiftablysupported on the casing, and adjustable means for -iiexing said strip.

17. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating flow through the outlet, means for biasing the valve toopen position, means for limiting the opening movement of the valve, andmeans for moving the valve toward its closed position against the actionof its biasing means and comprising a rotary knob, a cani connected tothe knob and rotatable therewith, an abutment on which the cam rides,spring means for urging the cam toward its abutment, and means movingwith the cam and engageable` with the valve for shifting the same towardclosed position.

18. A control device of the character described comprising a liquidcasing having a liquid supply chamber provided with an outlet, ametering valve for regulating flow through the outlet, means for biasingthe valve to open position, means for limiting opening movement of thevalve, an adjustable abutment supported on the casing, a rotatable knob,a cam carried by the knob and riding on the abutment, means on the knobcoacting with the cam for adjusting the rise thereof, a sleeve dependingfrom the knob and having a flanged lower end, and a spring interposedbetween the ange and the casing for pressing the cam against itsabutment, and a part carried by the cam and knob and engageable with thevalve for shifting the same toward and away from its seat as the knoband cam are rotated.

19. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valveregulating ilow through the outlet, and means for biasing the valve toopen position, means for limiting the opening movement of the valveincluding an adjustable stop pin engageable with a part of the valve, ascrew for adjusting said stop pin and means for limiting the extent towhich the screw may be moved.

20. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valveregulatingiiow through the outlet, and means for biasing the valve toopen position, means for limiting the opening movement of the valveincluding an adjustable stop pin engageable With a part of the valve, ascrew for adjusting said stop pin, a second screw interconnecting thefirst named screw and cooperable with the casing to limit the movementof the rst screw, and means for soldering said screws together.

2l. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating iiow through the outlet, means for biasing the valve toopen position, a rotary cam comprising a metal disk having a curvedstrip cut therefrom, a knob connected to the disk, a screw threaded tothe knob and engaged with the curved strip to depress the same, andlmeans supporting the cam for rotation and for causing it to pressagainst the valve.

22. A control device of the character described comprising a casinghaving a liquid supply chamber provided with an outlet, a metering valvefor regulating ow through the outlet, means for biasing the valve toopen position, an abutment adjustably supported on the casing, a camengageable with the valve and having its active cam surface riding onthe abutment, means for turning the cam, and means for causing the camto press against the abutment and the valve.

ROY W. JOHNSON.

